Releases

Number-format cleanup release with an Amount commas tool and explicit Global / Current selection scopes for Find / Replace.

Highlights:

• Data > Clean Data > Amount commas adds or removes thousands separators for strict numeric strings
• Preview counts for checked cells, numeric cells, and cells that will change
• Explicit Global and Current selection scope choices in Find / Replace
• Automatic Current selection default when a multi-cell range is selected before opening Find / Replace
• In-app Help page documentation for the new cleanup tool

Notes:

• Only strict numeric strings are changed; invalid comma placement, leading-zero IDs, currency symbols, percent signs, scientific notation, and text are skipped
• Signs and decimal portions are preserved; leading and trailing spaces around valid numeric strings are preserved
• Amount-comma cleanup is undoable and available in saved standalone CWS HTML files

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Data-cleaning release with duplicate removal, blank-row removal, space cleanup, format conversion, and encoding issue lookup.

Highlights:

• Remove duplicate rows by one column or a multi-column comparison key, with preview counts
• Remove fully blank rows from the selection or the whole data area, with preview counts
• Trim leading, trailing, and inner spaces, with collapse or remove-all inner-space modes
• Format conversion: lowercase, uppercase, capitalized words, full-width, and half-width, including Japanese katakana
• Find encoding issues (mojibake, replacement characters, control characters) without modifying data

Notes:

• All data-cleaning operations are undoable
• Formal header row is preserved by duplicate and blank-row cleanup
• Saved standalone CWS HTML files include the same data-cleaning runtime

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Major release with multilingual UI, embedded standalone vendor scripts, and Delete-key range clearing.

Highlights:

• Option > Language with English, Simplified Chinese, and Japanese UI choices
• Persistent language preference through browser localStorage
• Localized menus, toolbar labels, dialogs, status messages, and help/version text
• Embedded vendor scripts so saved standalone CWS HTML files import Excel without a vendor folder
• Help > Site link to open the product documentation website

Fixes:

• Delete key now clears the entire selected cell range instead of only starting an edit
• Saved standalone files keep Excel import support when opened outside the project tree

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Usability-focused release with a quick-action toolbar, dedicated print rendering, and Help/Version pages.

Highlights:

• Top icon toolbar for Open, Save, Print, Undo, Redo, Copy, Paste, Find/Replace, filter, and grid-limit actions
• Help and Version pages inside the application shell
• Dedicated browser print rendering that no longer reuses the live editing grid
• Print-range guardrails that block oversized print jobs
• Aligned standalone saved-file behavior for the shipped feature set

Other Changes:

• Disabled Save CWS HTML in local file:// reopen sessions when browser cannot provide a reliable save-back path
• Added direct keyboard shortcuts for open, save, and print

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Performance-architecture release with virtualized rendering for large datasets.

Highlights:

• Vertical virtualization for large row counts
• Horizontal virtualization for wide column counts
• Bulk write optimization for large paste and CSV import
• Row-delete and column-delete actions in View menu
• Fixed: blank-cell clipboard paste overwrite behavior

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First open-source repository release of CWS Light Table under the MIT license.

Features:

• Open and save standalone CWS HTML
• Import Excel workbooks (.xlsx, .xlsm, .xls)
• Import text-like formats (csv, tsv, txt, json, xml)
• Spreadsheet-style grid editing with formula bar
• Range, row, column, and whole-sheet selection
• Copy, paste, fill-repeat, undo, redo
• Find and replace
• Header-row control, filtering, and sorting
• Page setup and browser print
• Export CSV, TSV, and TXT
• Grid Limits for editable size control
• Standalone HTML output that opens in any browser

Release Notes:

• Standardized project name to CWS Light Table
• Cleaned repository for public distribution
• Added MIT license, contribution guide, security policy
• Published initial public documentation

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